Stainless Steel 1.4469
EN 1.4469
1.4469 (GX2CrNiMoN26-7-4) is a high-molybdenum super duplex stainless casting grade comparable to the tungsten/copper-bearing ASTM A890 Grade 6A / CD3MWCuN, UNS J93380.
Reference datasheet — 1.4469 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the SA condition
1.4469 tempers and conditions
1.4469 is supplied in 5 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
solution annealed heavy section (>100 mm wall) | Property set to expect at the core of thick pump/valve bodies where quench rate is limited. | 510 | 720 | 24 | 23 HRC | 2 % IACS |
As-welded deposit | Only for non-critical repairs — HAZ ferrite imbalance and nitrides reduce toughness and pitting resistance. | 540 | 740 | 20 | 26 HRC | 2 % IACS |
SADefault Solution annealed 1120–1150 °C + water quenched | Standard delivered condition for all sand/investment castings — full ferrite/austenite balance, no σ phase. | 550 | 760 | 28 | 24 HRC | 2 % IACS |
Hot isostatically pressed then solution annealed and quenched | Choose for pressure-containing or fatigue-critical castings where microporosity must be eliminated. | 560 | 790 | 32 | 24 HRC | 2 % IACS |
Centrifugally cast, solution annealed and quenched | Pick for seamless rings, sleeves and tube blanks; finer structure gives slightly higher strength than static castings. | 580 | 800 | 30 | 25 HRC | 2 % IACS |
What is 1.4469?
1.4469 (GX2CrNiMoN26-7-4) is a high-molybdenum super duplex stainless casting grade comparable to the tungsten/copper-bearing ASTM A890 Grade 6A / CD3MWCuN, UNS J93380. It is chosen for the most demanding chloride and sour environments, giving 550 MPa yield, 760 MPa tensile, 28% elongation and 250 HB after solution anneal, with SA+HIP and centrifugally cast forms also on file. Limits are a 260 °C service ceiling, poor machinability (score 28, about 20% of 1212 tool life) and mandatory re-solution treatment after major repair welds. 1.4468 or cast 2205 (1.4470) serve where full super duplex corrosion resistance is not required. 1.4469 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,350°C (2,462 °F). 1.4469 has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 83% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4469 used for?
- subsea trees
- sour gas valves
- seawater injection pumps
Advantages
- Good corrosion resistance — 80/100, better than 88% of stainless steel grades
- High strength — 550 MPa (79.8 ksi), better than 83% of stainless steel grades
Limitations
- Limited service temperature — 260°C (500 °F), worse than 98% of stainless steel grades
- Limited formability — 25/100, worse than 78% of stainless steel grades
- Low electrical conductivity — 2 % IACS, worse than 77% of stainless steel grades
1.4469 properties
Typical room-temperature values for 1.4469-SA; bars are the position among stainless steel grades.
Physical3
1.4469 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,350°C (2,462 °F).
Mechanical17
1.4469 has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 83% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4469 is rated for continuous service to 260°C (500 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
1.4469 conducts electricity at 2 % IACS, worse than 77% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (80/100), better than 88% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4469 takes about 55 MJ of energy and emits 4.6 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 60%.
Manufacturability8
1.4469's machinability is poor (28/100, worse than 79% of stainless steel grades); weldability good (60/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. 1.4469 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4469
Is 1.4469 easy to machine?
Machine like super duplex wrought: rigid setups, sharp coated carbide, low speed / heavy positive feed to cut under the work-hardened skin, flood coolant; expect ~20 % of 1212 tool life.
Can 1.4469 be welded?
Weld with 25Cr super duplex filler (ER2594 / E2594) or Ni-base 625 for overlays, heat input roughly 0.5–1.5 kJ/mm, interpass <150 °C; re-solution anneal + water quench after major repairs.
Can 1.4469 be formed, bent or molded?
Casting grade — pour with tight nitrogen and ferrite control, generous risering for the high shrinkage, then mandatory 1120–1150 °C solution anneal and fast water quench.
1.4469 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Clow carbon to avoid carbide precipitation | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.6 |
| Mn | ≤ 1 | 0.7 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Cr | 25 – 27 | 26 |
| Ni | 6 – 8 | 7 |
| Mo | 3 – 5 | 4 |
| N | 0.12 – 0.22 | 0.17 |
| Cuoptional; ASTM 6A (CD3MWCuN) additionally specifies 0.5–1.0 Cu and 0.5–1.0 W | ≤ 1.3 | 0.5 |
| Fe | balance |
What surface finishes work on 1.4469?
Pickle and passivate (HNO₃-HF) or electropolish after heat treatment to restore the passive film; no anodizing, and avoid iron contamination from carbon-steel tooling.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel 1.4469 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- GX2CrNiMoN26-7-4
- Also called
- CD3MWCuN
- Similar grades
- A890 Grade 6AJ93380
How much does 1.4469 cost?
1.4469 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1.4469 — frequently asked
What is 1.4469 used for?
1.4469 is typically used for subsea trees, sour gas valves and seawater injection pumps. In short: highest corrosion resistance here; super duplex casting grade; sour-service subsea castings.
What is the yield strength of 1.4469?
1.4469 has a typical yield strength of 550 MPa (79.8 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 83% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4469 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 79% of stainless steel grades). Machine like super duplex wrought: rigid setups, sharp coated carbide, low speed / heavy positive feed to cut under the work-hardened skin, flood coolant; expect ~20 % of 1212 tool life.
Can 1.4469 be welded?
Yes — weldability is rated good (60/100). Weld with 25Cr super duplex filler (ER2594 / E2594) or Ni-base 625 for overlays, heat input roughly 0.5–1.5 kJ/mm, interpass <150 °C; re-solution anneal + water quench after major repairs.
What surface finishes work on 1.4469?
Pickle and passivate (HNO₃-HF) or electropolish after heat treatment to restore the passive film; no anodizing, and avoid iron contamination from carbon-steel tooling.
Can 1.4469 be formed, bent or molded?
Casting grade — pour with tight nitrogen and ferrite control, generous risering for the high shrinkage, then mandatory 1120–1150 °C solution anneal and fast water quench.
What is the maximum service temperature of 1.4469?
1.4469 is rated for continuous use to about 260°C (500 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4469-SA and 1.4469 CENT-SA?
SA is the default condition — standard delivered condition for all sand/investment castings — full ferrite/austenite balance, no σ phase. CENT-SA: pick for seamless rings, sleeves and tube blanks; finer structure gives slightly higher strength than static castings. Yield strength is 550 MPa in SA versus 580 MPa in CENT-SA.
How much does 1.4469 cost?
1.4469 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 10283 — Corrosion resistant steel castings — CEN (2010)
- ASTM A890/A890M — Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex — ASTM (2018)
- ASTM A995/A995M — Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts — ASTM (2020)
- ASM Handbook Vol. 1 & Vol. 13B (stainless castings, corrosion) — ASM International (2005)
- Super duplex casting alloy datasheets (foundry/producer typical properties) — various (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.